1. Department of Epidemiology and Health Statistics, School of Public Health, Southeast University, Dingjiaqiao, Nanjing, China
2. Department of Prevention and Health Care, Rizhao People’s Hospital, Shandong Provincial, Rizhao, China
3. Department of Chronic Infectious Disease Control and Prevention, Jiangsu Provincial Center for Disease Control and Prevention, Jiangsu Province, Nanjing, China